Closure plug



F. C. WILLIAMS.

CLOSURE PLUG.

APPLICATION FILED ocr. 9, 1920.

Patented J 11110 27, 1922.

Li g the claims.

FRANK e. wILLrAi/rs, or SALT LAKE CITY, UTAH.

CLOSURE PLUG.

I Specification of Letters Patent. Patented ju 27 1922 Application filedOctober 9, 1920. Serial No. 415,725.

Salt Lake City, in the county of SaltLake and State of Utah, haveinvented a new and useful Closure Plug, of which the followin is aspecification. j]

his invention is a closure device for the filling opening of areceptacle} designed to contain liquids. V

One of the objects of the invention-is to provide a device of thecharacter mentioned, which will be simple and cheap in construction, andwhich will be capable of replac ing the usual screw plug now in generaluse, on automobile radiators, gasoline tanks for automobiles, and thelike. A further object is to provide a plug having a closure cap whichmay be opened or Closed by a quick movement so that the operator willnot run the risk of burning his fingersas is frequently donewhenunscrewing plugs of the type now in general use. A further object is toprovide means for locking the closure cap in place so that it'will notjar open while the vehicle is in operation. A further object is toprovide a closure cap attached to'the plug so that it will not becomelost or misplaced. I W I The invention will be hereinafter fully setforth and particularly pointed out in In the accompanying drawing Figure1 is a perspective view illustrating a closure device constructedaccording to the invention. Figure 2, is a longitudinal sectional view.Fi ure 3 is a detail perspective view illustrating the locking cam.

Referring to the drawing, 10 designates a tubular body, threaded at itslower end 11, to removably engagea correspondingly threaded portion inthe filling openil'ig'fof an automobile radiator, gasoline-tank, or thelike. Contiguous to the threaded por-' tion 11 the body is made angularas indicated at 12, to be engaged by a wrench.

The inner 'wall of the groove is extended to provide a flange 17,positioned to enter the cap 13, within the shoulder 14.

The body 10, is provided with an external fiat-faced lug 18, which istapped to receive a pivotscrew 19, said screw having a smooth shankportion, upon which is rotatably mounted a locking member 20. Saidlocking'member is retained in. position by the head of the screw 19, andto provide a finished appearance, the locking member is provided with arecess to receive said head.

The inner face of the member 20 is proyided with a pin engaging groove21, hav ing a slot 22 at one end, extending through the periphery of thecam, and a stop shoulder 23, at the other end. Said slot providesclearance for the passage of a pin 24, projecting from the periphery ofthe cap 13, the groove 21 being so positioned that the pin 24:, afterpassing through the slot, may be engaged by the groove when thelocking'member is rotated. When in locking position the pin is concealedby the lockingmember, as illustrated in Figure 1. f w

The cap 13 is shown as provided with a central aperture 25, to receivethe shank of a headed plug 26, said shank being threaded to engage a nut27, by means of which the plug is retained in position. Should it bedesired to attach a thermometer or the like, theplug 26 is removed andthe thermometer retained in place by the nut 27.

In practice the cap 13 is normally locked in closed position by means ofthe engagement of the locking pin 24, with the groove 21 of lockingmember 20. When it is desired to open the cap, the locking member 20 isrotated so as to bring the slot 22 to the top, whereupon clearance isprovided for the pin 24-, the cap may then be swung upwardly on itshinge connection. This may be done by a quick movement, and the hands ofthe operator are at no time in danger of being scalded by jets of steamor hot water, which often spurt through the filling opening of anautomobile radiator. In closing, the cap is swung downwardly so that thepin 24 will pass through slot 22 into the groove 21, and a slight turnof the member 20 will cause the said groove to so engage the pin, thatthe cap is positively locked in closed position, and the pin 21 isconcealed from view and so protected that it may not be accidentallystruck or raised.

From what has been said it will be observed that the body 10 may besubstituted for the usual screw plug now in general use on radiators formotor vehicles, and that the closure cap thereof may be readily openedor closed by a quick movement Without danger of injuring the operator.The device is simple in construction and can be manufactured at smallcost. It will be particularly noted that a very simple form of lockindevice is provided which is capable of efiiciently maintaining the capin closed position. Another advantage-is that providing the curvedgroove 21 near the peripher and extending the same partially aroun thelocking member 20, the grooved portion will be lighter in weight thanthe portion dis osed diametrically opposite thereto, the eavier portionbeing so positioned as to resist unlocking rotation of saidlockingmember when the latter is in lockinglengagement with the pin 24.

aving thus'explained the nature of the invention and described anoperative manner of constructing and using the same, although withoutattempting to set forth all of the forms in which it may be made, or allof the forms of its use, what is claimed is 1. A closure plug of thecharacter d scribed comprising a tubular body having its lower endprovided with means whereby itmay be engaged with the filling opening ofa receptacle, a cap hinged to said body and provided with a locking pinprojecting from the periphery thereof, and a rotatable member carried bysaid body and having means for detachably engaging, concealing andprotecting said locking pin.

2. A closure plug of the character described comprising a tubular bodyhaving its lower end provided with means whereby it may be engaged withthe filling opening of a receptacle, a cap hinged to said body andprovided with a locking pin projecting from the periphery thereof, and arotatable locking member r'emovably mounted upon said body and havingmeans for detachably engaging, concealing and protecting said lockingpin.

3. A closure plug of the character described comprising a tubular bodyhaving its lower end provided with means whereby it may be engaged withthe filling opening f a. receptacle, a cap hinged to said body andprovided with a locking pin projecting from the periphery thereof, alocking member having its -1nner face provided with a vcurvea groovenear its periphery positioned to register with said locking pin, thegrooved portion. of said locking member being lighter than the portiondisposed diametrically opposite thereto, the heavier portion being sopositioned as to normally resist unlocking rotation of said lockingmember when it is engaged with said pin,

4. A closure plug of the character described comprising a tubular bodyhaving its lower end provided with means whereby it may be engaged withthe filling opening of a receptacle, a cap hinged to said body andprovided with a locking pin projecting from the periphery thereof, and arotatable member having its inner face provided with a curved groovepositioned to receive said pin, said locking member having a slotleading from its periphery to said groove to provide clearance for saidlocking pin.

A closure plug of the character described comprising a tubular bodyhaving its lower end provided with means whereby it may be engaged withthe filling opening of a receptacle, a cap hinged to said body andprovided with a locking pin projecting from the periphery thereof, ascrew remov-- ably mounted in said body, said screw having a smoothshank portion, and a rotatable member mounted upon the smooth shankportion of said screw and having means for detachably engaging,concealing and protecting said locking pin.

6. A closure plug of the character de scribed comprising a tubular bodyhaving its lower end provided with means whereby it may be engaged withthe filling opening of a receptacle, a cap hinged to said body andprovided with a locking pin projecting from the periphery thereof, ascrew removably mounted in said body, said screw having a smooth shankportion, and a rotatable member mounted upon the smooth shank portion ofsaid screw and having its inner face provided with a. groove positionedto engage said pin and having a slot leading from its periphery to saidgroove to provide clearance for said pin.

In testimony whereof I have hereunto set my hand.

FRANK C. WILLIAMS.

